Can you lock a black ops 2 zombies lobby?

yes you can you have to go to game setup and all the way at the bottom and make sure it says do not allow join session in progress... i host mw2 lobbies if you want in 1600 Microsoft points im legit golden desrt eagles, gold ak-47 and gold uzi, im legit 23 of my friends have tenth prestige..... message BossyGeneticJoe on xbox live